Oil-feeding device.



U. P. HOOFER.-

OIL FEEDING DEVICE. APPLICATION FILE-i) JULY 22, 1911.

Pafpented .Sept 17, 1912.

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T OFFIC- QHAR'LES F. HOOFER, F SPOKANE, WASHINGTON.

OIL-FEEDING DEVICE.

Specification of Letters Patent.

Patented Sept. 1'7, 1912.

Application filed July 22, 1911. Serial No. 639,910.

dent of Spokane, in the county of Spokane and State of Washington, have made certain new and useful Improvements in Oil- Feeding Devices of which the following is a specification.

ltlfy invention relates to improvements in oil feeding devices and it consists in the constructions, combinations and arrangements herein described and claimed.

An object of my invention is to provide a device in which the feeding of the oil is accomplished by pneumatic means.

A further object of my invention is to provide an oil feeding device by means of which the flow of oil may be regulated to any degree, within limits.

Other objects and advantages will appear in the following specification and the novel features of the device will be particularly i pointed out in the appended claims.

My invention is illustrated in the accom panying drawings forming part of this ap plication in which- Figure 1 is a central section through the oil feeding device with the coiiperating air pump shown diagrammatically, Fig. 2 is a section along the line 2-2 of Fig. 1, Fig.

3 is a plan View of the oil feeding device, Fig. 4 is a section of the lower part of the oil cup, Fig. 5 is a side View of a lower portion of the valve casing, and Fig. 6 is a side view of the oil feeding piston.

In carrying out my invention I provide a main oil receptacle 1 having a base 2 pro vided with a reduced threaded portion 3 and a smaller reduced threaded portion 4. The base portions 2 and 3 are provided with a central bore 5, the reduced portion 4 is provided with a bore 6., while the portion 3 has a communicating passage 7 connecting the bore 5 with the bore 6. ,The base por- 'tion 2 is also provided with the side grooves 8 and 9. r

Secured to the base portion 2 in the interior of the receptacle is a guide yoke 10, which isperforated to permit the passage of a stem 11. The latter passes through the top 12 of the oil cup or receptacle, and is provided on itsupper end with a head 13. A spring 14 is disposed between the head 13 and the central portion 15 of the cover or top 12. The lower end of the stem- 11 is provided with a portion 16. The stem 11 is threaded at 11 to engage similar threads 15* in the central portion 15.

Referringnowiparticularly to F ig. 1 it will be seen that the lower threaded portion 3 is arranged to be screwed into the end of a casing 17 which is threaded at its bottom as shown at 17 to receive a nipple or other support (notshown). The casing 17 is provided with a branch pipe 18. An 1111191 valve casing 19 is provided, the upper end of this casing being screwed to the portion 4, as shown in the figure. Within the casing 19 is a piston 20'which is provided with resilient bearingst-rips 21. The piston rod 22 extends through the casing 19, through a plug 23, through the opening 7 into the central bore 5 where it terminates in a piston head 24. The pipe 18 communi-. cates with the interior of the casing 19 by means of the passage '18. The pipe 18 is designed to be connected with a pneumatic device P which is designed to force air into the casing 19, and then 'to-Withdraw it. Obviously this might be done by any of a number of pneumatic devices but I have illustrated this devicediagrammatically, in the simplest form, although in actual practice. I shall use a device which forms the'subject of another patent application. In thev presentinstance I have shown the plneumatic det a piston p,

vice P as being provided wi the reciprocation of which would'cause the air to enter and to be Withdrawn from the chamber 19. t From the foregoing description vof the various parts of the device the operation thereof may be readily understood.

Wewill assume'that the receptacle 1 is filled with oil. This *oil runs down through the passages Sand 9 into the central bore 5, but is prevented'from gettin farther by reason of the head124 which ts snugly in the lower part (if the bore 5. As the air is forced into the chamber 19 it will cause the piston 20 to'rise against the tension of the spring'20 As soon as the rod 24 passes t e lower endv of the grooves Sand 9 the oil will flow around the head and below it. The movement of the piston 20 may be regulated by turning the rod 11 so that the head 16 willengage the head 24 at difi'e'rent 2 1,0ss,sse

between the cut-away portion 22* of the rod 29 and the walls of the opening 7 (see Figs.

6 and 4), The oil flows into the bore 6 and thence through the openings 6 into the pasplates 12- and is provided with the lugs 12 to enable the top to be turned so as to permitthe filling of the oil cup or receptacle 1.

I claim:

1. In an oil feeding device, a receptacle provided with a cylindrical extension and having grooves running parallel with and connnunicating with said extension, at plunger disposed in said extension, a plunger rod having a cut-away portion, a piston head secured to said plunger rod, a chamber for said piston, means for forcing air into and exhausting air from said chamber, an exterior casing surrounding said chamher and spaced therefrom to form a passage way, said passage Way being adapted to be connected with the interior of said extension through the movement of said plunger rod.

2. In an oil feeding device, a receptacle provided with a hollow cylindrical extension and having grooves establishing communication between the interior of the receptacle and the interior of said hollow cylindrical extension, a valve seat within said hollow cylindrical extension, a screw plug for closing the bottom of said cylindrical extension, a plunger valve within said hollow extension arranged to engage said valve seat, a plunger rod having a cut away portion connected atone end of said plunger valve, a piston connected to said plunger red at the other end, a chamber for said piston, and a spring within said chamber arranged to hear at one end upon said plunger and at the other upon said plug.

3. In an oil feeding device, a receptacle provided with a hollow cylindrical extension and having grooves establishing communication between the interior of the re ceptacle and the interior o -said hollow cylindrical extension, a valve seat within said hollow cylindrical extension, ,a screw plug 3 for closing the bottom of said cylindrical Wtextension, a plunger valve within said hollow extension arranged to engage said valve i seat, a plunger rod having a cut away portion connected at one end of said plunger t valve, a. piston connected to said plunger rod at the other end, a chamber for said pisl ton,'a spring within sald chamber arranged to bear at one end upon said plunger and at l the other'upon said plug, an exterior casing I having communication with the interior of said cylindrical extension above said I I I l I l l l said chamber. CHARLES F. HOOFER.

lVitnesses J. OAKLAND, VIDA MERRILL.

lug and a pipe for supplying'motive fluid to 

